Method of manufacturing gas.



No. 826,11. fTEN'IED JULY N96. J. J. JOHNSTON, BEGB,

IN VEN TGF W/TNESSES No. 826,511. PATENTED JULY l?, 1906. J. J. JHNSTON, DBGD. s. n. ALLEN, mmmsrnuon. MTHOD 0F MANUFACTURING GAS.

PPL! T A 0A ION FILED NOV 14.1902 s BHBETB`SKBBT 3 67 attozmu NQ. 826ml PATENTED JULY 17, 1906. J. J. JOHNSTON, DEGD; J. E. ALLER, ADMINISTRATOR. METHOD 0F MANUFAGTURING GAS.

APPLIUATIGZ'T FILED NOV.l4.1902. a SHEETS-BEEET 5.

No. 826,5. PATENTBD JULY I7, 1906.

` J. JJJOHNSTON, DECD J, E. ALLES, AIBHHHSTRATOE.

METHOD OP MANUFACTURING GAS.

APPLIU'rIos Hmm Nov. m 1902.

^ 3 SHEETS-SHEET a.

Y m/VY j, ff ./g PQ y s "n l mi ,f Y /7 //f a Ammer.

No..826,511. PATENTED JULY I7, 1906. J. J. JOHNSTON, DED.

J. n. 1.25m ADMINISTRATOR. METHOD OPMANUPAGTURING GAS.

8 SHEBTS- EERST 7.

APPLGTQH f'ILBD HOV. 14.1902.

NO. 826,511. PATENTE!) JULY 17, 1906. J. J. JHNSTGN, DECD. J E ALLEN wmmamn'ron METHOD GF MANUFACTURING GAS.

Arrmcnmiz mmm mv. 14, 1m.

B SHEETS-SHEET 8.

Y Ving end Viliuminedsin.

UNI-PED STATESPATENT OFFICE.

JoeriiincLeriy-or ooLUMeiANA. oHro, dominieren-roe or JAMES J.

JOHNSTON,

, y feriti@iiewme METHODVOF MAN me. 826,511. i

Specification of Letters Patent.

HDECEASED, Assieme 'ro Annee; ngriimls, or Prr'rsuFAcre'eme eine'.

Patented July 17, 1906.

riginallcpplicstion led September 17, 1897, Serie No. 852,05 l, Divided and this epplieatina 61nd November 14, 190%. Serial .1. A, y No. 131,319.

To ,chi whom it may concern;-

vBe it known thet'JAMEs J. JOHNSTON, de

'ceesed, 'Yate a, citizen of the United States,

lifetime invent certain new and usefui Imu ovenients in niiieino`clsk of Manufacturing that I, Join? E. ALLEN, administrator ofthe estetecf' the said JAMES J. 501m# s'ir; deeeas'edde hereby declare the foiiowin to be a. fuli, clear, 'and exact description o the invention, such as will enable others skilled the crt tol which it epperteins to mal'e end'use the sarne.

This' invention'r'eletes to the manufacture of ges, and hes for its object certain improvement'syi the method of manufacturing lieatf Y Ysold es en article of commerce for burning in lamps and for Vother purposes.

By this method al the oil charged into the eneretorsmcy'beevolved or converted into n eating oriiiuniinating ges, or a ortion thereof at certeinstage's in the met od and operi tion `me? be' `.collected as a product of conare claimed in the* a Vplication fer e patent,i

densation or distillation in the form. of refined oil which does not require the use of suifuric acid er ceustiesode, als in the ordinary course of treating refined oil.

In'tiie present invention compressed etmospheric air, crude petroleum-oii es cb# tained froni'tlie earth, .and wood-charcoal or other porous non-oleaginous carboneceous matter, such es coke (preference is, however,

iven` to woodchercocl) are used, es wiii ereinafter more' fully ep ear, and by'which under this method ail t e oil maybe con;im

verted into ges Without formingceeli-ter.V W

The means for carrying out the inention Serial No. 652,051,1i ed September 17, 1897,

o of which 'this applicction is a division.

V' 1n the `accompanying drawings, which gas which wan be muy i Vdisclosed in' the fol owing specification and form eert ef this specification, Figure represents Vav diagrammatic elevation; Fig. 2, a diegreneetie pian View; Fig. 3, e vertical sectien ci the air-heater and e side eievetio'n ci the air-pump, partly `in section; Fi 4, a verticai section of a washer `or condgenser; Fig, e -vertical section and a side elevation, pertiy in section, of two connected gener eters; Fi 6, e top plan of the upper'tube- Sheet in t e generators; Fig. 7, an inverted plan of the lower tube-sheet; Fig. 8,73. verticel section of the retorts and furnaces; Fig. 9, a vertical transversesection of the fixing apparatus and furnace Fig.A il), a vertical longitudinal section of the seme; Fig. 1i, e. verti cal section of the cooler; Fig. i2, a longitudinel section of the gas-burner; Fig. 13, e side elevetion'ofrthe residuetoil feeder, end Fig. l14 e top plan View of the seme. Y

Reference being had to the drawings and lthe characters thereon, A indicates an eirpulnp, which may be provided with a. by-pese Y valve 'a te return the air to the 'cylinderwhen working in excess ei'air required, and is connected to the eirheater B by a. pipe t. The constmction of the-heater B is shown in Fig. 3, in which c d ereV lates connected by e vseries of tubes e, Whic communicate with chembersfg, the fermer being the receiving- Ycliember and the letter the. discharge-chamber.' YThe'reiienaioer h 'around the tubes e is ifkdereinefter more fully ep ear. The heeterB isV connected to the iirst c "eser-ies of enel-sters C by a pi e "i, which discharges. intelieclicmber 5i.' he enereters are each preidedwith two pertitlon-pletes is l To the Splates ic Z are permanenti? attachedV tubes ne, the lower ends ef Ywhich pass. Vigfnjeugii openin sin the plete Z, thereby conrnunieatingfwit the cheminer n, ,formed in Athe detacieble end piece or head o, and by Ythe piete I'. The piste l is provided with numerous 4pelforla.tions, the combined area of which should beeqne to the area of the pipe To letelris attached e ipe the oppo site en of which i'satteciie to t e side well Yof the heed fr,V The generator C is also provided with a, fleeting-coil s, which surrounds the pipes m.' The upper and -lower ends of seppliedfivith 'steamfor heating the air, es w1 scid coil, respectiyely, communicate with a tal extension t, through which the solids are i steam-supply pipe t and a diseharge-pipe yu, said pipe boing provided with suitablf.- branches and valves. The lower head o of 'each generator is connected to :t pi pc n by' a branch in, havingr a valve g/ for supplying the charge of crude oil to the gci'iorators and for `withdrawing heavy or residual oil.

The several generators are connected by the pipes i, as indicated in Figs. l, 2, and 4.

The last generator in the serios is connected by pipe .t to a-wusher or condenserl), the construction of which. is sulgistantially the saine as thc generator with the limiting-coil omitted, and is shown in Figli. The washer or condenser D, as shown in Fig. 4, is novided with two partition-plates l 2, to which are attached tubes 3, the lower ends ot which pass through the plate 2, thereby connnuliieating with the chamber 4 in the head 5, and the )late 2 isprovided with perforations At the upper end of the washer is a head 7, having a chamber 8, and connnunicates with the last generator by a )ipe :r and with the main N by a pipe il and is provided with a valve 10 and pipe 11 for discharging the water trom the washer, whichwater is maintained at about the dotted line l2 or a little below the pipe b. (las from the last genera-- tor C after passing through chamber 93 enters the washer l) through pipe .r and from chainber 8 passes down through tubes 3 into chainber 4, from which it rises through pertora tions 6 in plate 2 and passes up through the Water and is (.lischarged through pipe Q into main N and passes on toward its tinal dis-` charge. The light oil or distillate or resultm ant condensation of the oil in the gas or vapor collects on the surface of the water and is drawn off through pipe Ir' at suitable intervals. to the dotted line ora little below the pi e b.

`In the pipe rf is formed an enlarged c 1amber at', in which the gas expands and )art of the by-product or light oil, the result oidistillation and condensation, is arrested and collected and drawn ofi' at suitable intervals through pipe arg an d stored in a rccei ving-tank M tor subsequent use.

The washer is provided with valves c if, the former for supplying water thereto and the latter ior drawing ofi refined oil.

To the ,vaslier l) is connected the gas-main N, which is provided with a valve c, and from the main a piped, provided withavalve c, connects with a horizontal extension g of the primary retort li), as shown in Figs. l, 2, and 8.

The rirnary retort E is provided with a vertice extension f, through which it is charged with solids, and a horizontal eXtension g', through which the solids are removed.

F indicates the secondary retort, which is provided with a vertical extension h', through which it is charged with solids, and a horizow The washer is filled with water about removed. The retorts are provided with ord inary sight-gages (not shown) to indicato the height ol' liquid in the retorts.

The primary retort is connected to tinx sce` ondary retort by a pipe lr',| leading from the extension j", provided with a valve and havingl :t branch Vmf, provided with a "ulivo i1 and colnniunicating with the extcn=-iun `i ot the lai tor retort, and from the extension 7i of the secondary retort a pipe o', having a valve p', connects with the pipe k', and from pipo lc a pipo q, having valve r', connects with the iixing-turnfice (lr, and from the pipe if" a, pipe s', having valve t', connects with the niain N, and a pipe u connects with a cooler or ci'indenser ll and a pipe u with a washer l. The pipe u is provided with a valve `in and the pipe t" with a valve y. By this construction of )ipos and valves the gas from the washer l!) may all be directed into the main 4N while the oil in generators C is yielding rich gas, or part of the gas may be conducted into only one or both of the retorts, and the gas may after leaving the secondary retort be conducted through the condenser H, or gas from the primary retort may be conducted into the fixing-furnace and from the fixing furnace into the washer l.

The retorts E and F are suitaiily supported in masonry and are provided with gas-burn- ,ers having gas-supply pipes e2 for heating the residual oil charv'ed into one or both of them, and are provided with safety-valves l) and with thermometers and pressure-gages, which have been omitted from the drawings to avoid crowding and causing confusion. The gas-burners consist of a hollow cylindrical body f2, having a receiving-chamber g2 therein and provided with openings ft2 at each end and an opening i on its upper side, a hollow cylindrical body k2, havingr a distrihiding-chamber Z2 therein, and the two chambers g2 and Z2 are connected by a pipe m2, which extends through the chamber g2, is screw-threaded from a point inside of the .inner endfof the bodyf2 to its outer end, and is provid o d with a series of pertorations n2 within thtl receivi11g-chamber and a cap o2 at its outer end. The openings lf2 are smoothbored, und the pi )e in? is secured in position by nuts p2 p2 with packing 12 lq* inserted l e tween them, and the ends o t 1c bosses r2 r2. The opcnin f t2 is internally screw-threaded to receive t'ie gas-supply pipe e2. The perfor-ations n in the pipe m2 serve a twofold purposennamely, they admit the gas from the receiving chamber g2 to supply the burner and also serve as a safeguard a ainst the gas burning backiinto the source o supply. i The perforations equal in number the discharge-tubes s2 and are of the internal diameter of the tubes-namely, one-fourth of an inch. The discharge-tubes s2 are about twelve inches long and are arranged in a cir cle in the head ,ti of the body k2. The gas IOO hoin,the-receiiiing-chaniherg through `pipe m-in'tothe distributing-chamber l exstatu panda in the latter chamber, and therebyab` j air-,supplying chamber u, forme in the Wall "of themason'ry, and maybe provided with a .valve chavng' a. sries of openings wl to regulate the duautity of air admitte( The'zoln'busion-chamber Q of the furnace islprovidefdf'vri h perforatedtile "f2 of refrac- Inaterial' arranged at an angie to the 'pla'iefof lthe burners and against which'the gasfrom the burners and the air impinge as. they enter the furnace, and underneath the tile'ie a chamber iilled with pieces of fires brick or other refractory material. The tile pieces of refractory material become lnvghltheated, and the gas and air striking the1r inclined surface enter the perforations, are thoroughly ornmin'g'ied, and burn with great' ...ntei

"' The burner forms subject-matter of another application for a patent, filed Septembef 17,.,1897, Serial No. 652,952, patented vJune 30,1893.

` The fixing apparatus consists of a cylinder ai vf to which is' attached a series of xpos b3,

hichextend across the furnace Van at their upper endscommunicate with a cylinder c, W 'ch cylinderand horizontal portions of the pipes should'he filled with small pipes c for V the'purposeof. au menting the heating-sur-V 'face'fwith which tli e' gas cornes in contact. The cylinder as connects with the pipe g', and thecylinder c3 connects by branch d with the pi k', communicating with` the Washer I,

vvn ich may be constructed the saine as the washer D. From the Washer I-the as is conducted through pipe d5 to a main and then to,` s. holder J or to a furnace to be burned.-

.taieaiteaaa 'ies hay 5' 'lille pipe c 'The xed a paratusis supported in the furnace G an 1s heated by gaslburners e3, the arne from which is spread by contact with the beliefs, (which'mayheof fire-clay or other refractory material,) resting upon the:

grate-bars of the furnace. The crown of the combustin-chamber 'of the `furnace yis proV videdgwithvertical passages ga for the flame Aiheatte enter the chamber in which Vthe fixing apparatus is placed, and freni it the "waste products of combustion pass olf through' fides ha into stack t. Y

Y `The cooler H consists of a pi el:a A,which is containedfin a tank.Y is, supplie with runner l watertorkeep the pipe cool b any Ypreterre Y 'arrangement ofV supply and ischarge pipea (Net. shown.) The cooler is connected at its.

er end-te [pipe lc by a branch mi, provided laalvem?, and at its lowjer end it commupe ci,provided with 1s provided with a.

un Wl] valve pa.

plied to the prima valve q to cut off communication with the. washer I and the pipe d with a valve r" to cut oil' connnunication between the washer. and the main N. A

K indicates a supply-tank from which oil is conducted through ipe s to pipe o, which extends along under t e entire series ofv-` gen'- erators C, for charging them through the branches 'w and valves y, and tbe-heavy or residual oil YYfrom which the light hydrocarbon olshavc been extracted is conducted through said valves, branches, and.; pipes o and t3 tothe Ytankif Inpractiee the 'heavy 'orrsidual oil is forced rom the several gencraters Gte' the tank L by pressure of air from the prump d, and a, connection ma also he mede om 'the ump to, the tanks and L for discharging t eir contents, as indicated at 3e in Figs. 1 and 2.

R indicates the residual-oil feeder, connected to the retorts E and F by a vertical pipe a, having'valve b* and horizontal pipes ci d, having valves e* j, and discharge into the` retorts, respectively, through `vertical pipes g* and h. YThe feeder is preferably provided with a funnel i, having strainer k* to arrest any' foreign matter, and with a valve l, which controls the supply to the feeder from the pump with suitable connections. The feeder is also provided with a si llt-gaffe am to indicate the height of the oi in t e feeder and with an air-valve n* to relieve the feeder of air to charge it KWith residual oil.

In making heating-gas residual oil which has been drawn from the generators is supretort E only in quantity to be vaporize and the vapor mingled with a gaseous product coming from the generators; but in making illunnnatingas residual oil ma Y be snppliedto both t e rimary retort and the secondary retort in the Vro ortica of'about twice the quantity to t e ormer that is supplied tothe latter. Both the retorts are supplied with a nonole 'inons 'carbonaceous substance, such as har -Wood charcoal, which has heen carefully Aselected to be free from bark, dust, or an'solid matter of greater specific gravity thathe oil that may rest on the bottom of the retort, exclude oil from contact with the metal, and thereby cause it to burn, or coke ma? be used. Preference is, however, given to charcoal.

vThe resid-cated tank L is connected to the ipe fv b a piipe t, having valve u, and the regned-oi tan M is connected to the same pipe fv by a pipe o,having valve wand the ipe e is connectedto aY um (not shown) y a pie se that allY t e o1 used may bev su he and transferred hy the-same pump. e several generators and yWashers shcu d be provided with the ordinary sight-gage to iFndlcate the height of liquid, as shown at g 1n ater lis supplied to the several Washers IOC or condcnscrs by means of pipe (1.5, branches lf', and valves c5, and the pipe (L5 col'mects with the pipe o for washing the generators when desired,

ln the practical demonstration of this invention a large number of plants have been constructed for the purpose of ascertaining the best forni of generators, and therefrom it has been concluded that the best results can be obtained by adopting the following proportions, to wit: For generators three feet in diameter the height should be about fifteen feet, the pipes i connecting the generators about four inches in diameter, the tubes m about two inches in (iliameter, and a sufficient number employed to furnish an area a little greater than the cross-sectional arca of the pipe i. For generators 'four feet in diameter the height should. be twelve feet, pipes fi five l inches, and tubes m two inches. For enerators five feet in diameter the height should be ten feet, the pipes i eight inches, and tubes m two inches. ln all of the generators the number of tubes m must be governed by the area of the pipes i and distributed. through-- out the generators.

The invention is not limited to the proportions enumerated; but from experience they are the most desirable, and these proportions are given to enable the constructor to make a plant with certainty of successful operation.

The generators may be reduced in size as well as increased by the skilled mechanic without departing from the spirit of the invention.

All of the valves should be gate-valves or key-valves to form direct or unobstructed passages for the fluid.

The retort E should be about equal in diameter to the generators and about twothirds the length thereof, the retort F about twothirds the length of retort E, and the washers should be about the size of the generators used.

The generators C are charged from tank K with crude etroleum, preferably in the condition in whlch it is taken from the earth, (the specific gravity of which varies in different localities) to a depth of about three feet, and the washers are supplied with water to about four feet in depth. Cold water is charged into the washers and is maintained at a temperature below the temperature of the gas comlng from the generators'. The retort E must be heated (and in practice it has been found that from 400O to 600O is sufficient) to vaporize the oil, the retort 7F heated to from 400 to 7000 (when charcoal is used in the latter retort,) to make fuel as to be burned direct without the use of a -older, and the fixing apparatus in the furnaceG to from 1,000o to 1,200o Fahrenheit to fix the gas for illuminating purposes. Care must be taken to prevent the retorts being heated toa degree l toigntc the charcoal. Therefore when retort f1 F alone is used to dry or x the vapors or gas emanating from retort E clean'coke should i be used in said retort and may be heated to from 1,000o to 1,500o with safety. Steam is i now admitted to the chamber h of the airheater B, the pump A put into o eration, and j air forced into the heater un(v er an initial t pressure of from four to fifteen pounds to the ,l square inch, the pressure varying according to the proportionate size of the plant, and heated to about 90O Fahrenheit during the ii rst stage 'of the operation. From the heater the air is conducted into the chamber j of the first generator C and passes down through the tubes Ym into the chamber n, where it cornes in contact with the oil, agitates it, and passes up through the erforations p in plate l, and through the ody of the oil above said plate and iningles with the permanent gas always present in the oil in its crude state, and then from the space above the oil it enters the branch g and flows through pipe 'i into the next generator C, and throughout the entire series of generators into and t rough the washer D, then into the retort E, where it mingles with and is enriched by the gas evolved from the oil vaporized in the presence of the charcoal, passes up through and is further enriched by the vapors held in sus ension by the charcoal and the carbon of t e charcoal. In this operation the charcoal cracks the fine globules of vaporized oil, takes up and gives off the vapors continually, as the gaseous product 1passes through it, the charcoal in the upper portion of the retort being much hotter than the cil. ln manufacturing fuel-gas the gas is preferabl conducted from the retort F to the cooler I" the gas having been sufliciently dried or heated in said retort to make'a fixed gas, and is in condition to be distributed through mains or supply-pipes to the place or places of consumption or to a holder; but in the manufacture of illuminating-gas it may be found desirable 4to conduct the gas from the primary retort E throu h the secondary retort F and` then to the ixing apparatus, and from the fixing a paratus the gas should be conducted througli washer I to relieve it of any impurities, such as carbon, formed in the fixer before conducting the gas to the holder. In starting the o eration of the plant the retort and the fllxing apparatus may be heated by gas evolved in the generators and passed through the washer D by making a connection between the pipe c and the burners in their respective furnaces, or the gas may be used forgeneral heating urposes from said oint, or the-gas after aving been enriche in the retorts E and F and passed through the cooler H may be conducted from pipe N for use as a heating-gas to be consumed as fast as lit is generated, when short supplysmains are require@ to reach the piileeofoonsumption by the 'proper l tionekof the Yoil `Yoepiahle ofL being liberated, atV

mani ulationV of the several valves shown l plant 1s worked with, the auror the Qllfheated to about 90,i1ntil and ascribed. The

the .permanent gasin. the oil and ltheemanaeo-low ede eeofftern )erature have been car,-

lidoff andthe: asf's owe .signs of beeonzing,V

'aseertained by the skiliu operator. The 011 in the (generators may be kept at a depth indicate by providing them with automatic feeding devlees or by forcing oil in from the supply-tank.. In the operation of the plant or apparatus a large uantit of renedoil of a superior quality, t e reso t of distillation or condensation, collects u on the surface of the water in the washer which may be drawn oil' through ripe b of said washer and conveyed to a suita e'receptecle, such as M. Thisl oil is of a specific gravity of about 60,

which much lighter than the oil of the oriinel Ieharge, and is transparent and may used forenriehing' a subsequent charge in the generators., or it may be utilized as a burning oil for lamps. The oil requires no treatment with sulfuric acid and caustic soda. to bleach it and will therefore feed up the wiok of a lamp better than oil thus treated. The gea or residual oil in the generators which as gravity is eonduetedfrom the generators te the tank L from which it is conducted into the feeder of the retorts E and F to be' used in subsequent eharges for enriehin the gas from the generatore, or the residue oil may be conducted directly from the generators te or reeiduai oil in the resence oiboharcoel or coke in the retorts al 'of the oil may be converted into' as and the formation of coal tar or hard or aked carbon from the oil prevented forrnin v in the retorts. Y Y Y Y It will be o served that 'seven generators. are shown, the u ose of which is that the heavy oil may e rewn from one generator at a time, thereby keeping a full complement of preferably six generators in use for mak-ing In making illuminating-gas by the niethod and apparatus herein described the ml in the generators should be heated from about 15Q" to 250 Fahrenheit as the specific gravity of the oil decreases and theY entiremethodv" een worked down to a low speciiiek 'retorts Y from theA enerators reaches t ratusy'an the' heatv of the fixing apparatus shouldvlee maintained at a temperaturenot exceeding 1,209@- and not less-than 1,0009,

a heating medium. The candleuwer of the phoiiereeter, such as the Weildrneien Jones instrument, When it is desired to stop the pninprfor any cause, care elionid he tekento e'l'ose the valve in the ipe between the pump sind theek-heater. Fhis beeornee necessary to preventbaok pressure driving the liquid in one generator back into another. The airpnmpshould he of a capacity to supply air to Y the 'generators atY a moderate speed of the pump to prevent carryin oil from one geneiator to the other, thus a lowing the excessiye particles of oil taken up by the air to preipitate in each eneretor end affording time for the air and t e gaseous emanations from or roducts of the oil to combine with the air an p form aixed ges. In making fuel-gas the same operation is practiced with reference to the 'heat applied to the oil. in the generators I the working of the air-pump.

by Beating the residual oil inthe retorts in the presence ofvehareeal or coke and converting eaid oil into gas the fact has been demonstratedrepeatedly that no coal-tar. is formed inthe retorts, and as a consequence no solidified carbonV adheres to the inside of the retorte, which when fcrmedinvariably causes the metal of which the retorts are formed to be burned'rby preventing the oil coming m contact the metal where it is e y used to a high degree of heat, and it has fur-t er been demonstrated that all the oil can be convert ed'intoigas, if desired.

When the pores oi thecharcoal or coke beeor'nelilled, so that it can no lon eritake up and give oil'l the oil in the gas, it s mild be remoyed from the retorts and fresh eharcoal er eolie supplied. This condition ofthe char eoalxlibe manifested by the presence or aeizi the sight-gage applied to the. horizontal necks of thelretorts, but not shown inthe drawings. The aseous (product from the generators'may a be con noted through the orY part may be permitted to yflow through themain N and mingle with the gas from-the retorts,n and all or part of the gas from retort E may be conducted through re- A u il moderatel y worked Iintil the glaseous productf V ey ixing appa- Y 77 ywhielnean be easily done. by using the gasasf gas may be ascertained vby a. testa ight ergly afi In the Ypraetieal operation of the invention i' i Y enrniiation of thick oil, which will be shown the feeder R. By thus Workinv the heavy' 'i When workingwith fresh oil in ali the gen oratore, the gas-is of sufeient -{riohness to .omit the retorteand is conducted frornlthe waelier' l)'".(or"the washer may be omitted) through main N without passin f through the retort or retorts until the gas s ows signs oi' becoming weak or lean, when byiuanipulat- 111g the valve e in the main N and valve e in pipe d all or part of the gas from the generators may be conducted through the retort or retorts.

The Water in the Washer l) may he withdrawn, and the vessel may he used to arrest the light oil of distillation and condensation from the generators, and thus prevei'it it hc-A ing carried into the main N and into the rctort E when used or to the burners or holder when theretort or retorts are not heilig used.

Having thus full),T described the invention, what is claimed is 1. The method of manufacturing gas frein petroleum-oil, which consists in -ompressingr air, directing said air through so parate bodies of said oil successively, heating residual oil (from which the light hydrocarbon-oils have been extracted) in the presence of a Anonoleaginous substance to a degree to vaporize said residual oil, and connningling the product of the air and the oil with the product of the heated residual oil.

2. The method of manufacturing gas from `petroleum-o1! which consists 1n compressingr petr0leum-oil which consists in compressing air, heating said oil,` directing said air through said heated oil, increasing the heat of the oil as its specific gravity is reduced, heatin residual oil (from which the light hydrocar onoils have been extracted) in the presence of a non-oleaginous substance and cominingling 45 the n'odilct of the air and the oil with the prodiuct of the heated residual oil.

4. The method oi n'mnularturing gas from crude pctrolcuneoil, which consists in compressing air, directing said air through separate bodies or columns oi' said oil succf-issivelyyl heating residual oil previously subjected to the foregoing operation in the presence of a porous non-olcaginous substance and coinnlingling the product of the air and oil with the product of the residual oil and then conducting the gas through a body of heated porous noirolmginous substance.

5. The method oi' inaiuil'acturing gas from crude petroleum-oil, which consists in coinpressinq air, directing said air through separate bodies or columns of said oil, separating and collecting the light oil or distillate of pctroleufnrarried by said air, heating residual oil in the presence of a porous non-oleaginous substance, and eonln'iingling the gaseous product of the air and the oil with the product of the residual oil and again heating the resultfmt gas.

6. The method of maimfacturing gas 'which 'onsisls in comprcssiiig air, directing said air through crude petroleum oil, vaporizing residual oil in the presence of porous non-oleaginous carhonaceous matter, coinmingling the gaseous product of the air and the oil with the product of the vaporized oil, and subjecting the resultant gaseous product to heated porous non-oleaginous carhonaceous matter.

In testimony whereof l affix in v signature in presence of two witnesses.

JOHN E. ALLEN,

Administrator of the estate of J aimes J. J 07msion, deceased.

Witnesses: l

FRED. D. LoDG'E,` THOMAS WINING. 

